Too much foam from waves β draw back (7)
I believe the answer is:
surfeit
'too much' is the definition.
'foam from waves draw back' is the wordplay.
'foam from waves' becomes 'surf'.
'draw' becomes 'tie' (synonyms).
'back' is a reversal indicator.
'tie' back-to-front is 'eit'.
'surf'+'eit'='SURFEIT'
(Other definitions for surfeit that I've seen before include "Overindulge" , "Superabundance" , "Fustier (anag)" , "excessive amount" , "stuff, once" .)